Sakarya city is an important tourism center in the Marmara Region. First of all beaches lies along Black Sea shores, lakes, rich forests and plateaus, valley and canyons, hot springs and mineral waters springs are natural values that Sakarya has. It has borders with the cities; Kocaeli on the west, Bilecik on the south, Bolu on It has borders with the cities; Kocaeli on the west, Bilecik on the south, Bolu on the southeast and Düzce on the east.

The Sakarya's climate shows characteristics between the Marmara Region Climate and the Black Sea Region Climate. Therefore winters are much rainy and less cold, while summers are hot.

Sakarya Museum is in Sakarya city centre on Semerciler Quarter, Milli Egemenlik Street, across the station, is established on an area of 1290m2 with the garden. The building that has been constructed by Major Baha Bey, Chairman of Military Service Office in three floors with the ground floor in 1910 - 1915, has been purchased by Hasan Cavit Bey, who was a close friend of Atatürk and a deputy. His house, where Atatürk has met his mother in June of 1922 and where they stayed for five days, has been damaged in the earthquake that took place in 1967. The house registered as a civil architecture sample in 1983 and has been nationalized by our ministry and reconstructed as the museum building in compliance with its original and opened to visit in 1993. The service offices and boiler room are on ground floor of the building, where the director's room and an exhibition hall of 85 m2 and a conference hall of 50 persons are located on the second floor. In the garden of the museum, the architectural parts found in the borders of Sakarya province, belonging to Roman and Byzantine Periods, grave stones, altars, stones with inscriptions, ostotech, cooked earth storage jar and column bases are exhibited. In the exhibition hall of the museum, a group of archeological works belonging to the Roman and Byzantine Periods and ethnographic works belonging to the Ottoman and Republic Periods are exhibited. Among the archeological works, there are flat hand axes, cooked earthenware pots, essence and tear bottles and metal and glass works. Among the ethnographic works, which are selected from the Ethnography Museums of Bursa, Amasya, Konya, Tokat and Ankara, there are goods used by the Grand Leader Atatürk and firing and cutter guns, copper goods, seals and hand ornaments belonging to the Ottoman and Republic periods.

Harmantepe Castle is located on the one hectare area of a little hill, upward site of Adapazari Harmantepe Village. Adliye Castle that placed 1,5 km south of Adliye Village depended to Adapazari, estimated that probably built as border protection castle.

Orhan Mosque remains from Ottoman period at city center and Yunus Pasha Mosque 15th century Ottoman period creation at Tarakli. Elvan Bey Charitable building was built as a charity establishment in 1450, which today still preserves it's all properties. There is a tomb of Elvan Bey, that takes its name from three domed building in the garden. The building is currently using as a library. Jüstinianus Bridge's (Beşköprü) building process began in AC 553 and ended in AC 561, Bridge that built on Sakarya river by the Byzantine Emperor Jüstinianus, as a result of river change its bed it is now at the open ground.

Ali Fuat Pasha Bridge was built by Sultan 2nd Bayazit in 1495, and connects Geyve county center to Ali Fuat Pasha town, known as Sakarya bridge too.

Poyrazlar Lake is an importance place in cities tourism with environs and in forest resort places. Akgöl Lake, a little bit inner Karasu holiday center of the Black Sea. Both places have beautiful landscapes. Coastal sides of Karasu and Kocaali counties have important contribution and vigor to cities tourism activities and known as an important natural beauties of the city.

Sapanca Lake and environs that founded by tectonic formations of Sakarya, is a center that occupy especially weekend needs, recreation and resorting purposes of city center and firstly Istanbul and other cities of region, because preserving very interesting natural beauties and location ease of arrival to dense settlement places. In Arifiye forest at high's of Sapanca Lake, there are beautiful camping and picnic places present. Sapanca lake that national and international surf, sail and rowing competitions arranged in, attract lots of sportive visitors with those kind of organizations.

• Adapazari
• Akyazi
• Arifiye
• Erenler
• Ferizli
• Hendek
• Karapurcek
• Sapanca
• Serdivan
• Sogutlu
• Geyve
• Karasu
• Kaynarca
• Kocaali
• Pamukova
• Tarakli